OUCH what is on my live rock?

pufferfish

AC Members
Apr 5, 2005
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I just set up my liverock into a stable shape that I wanted. Problem and Concern is I keep getting PRICKED... by little clear needle like things that I can barely see.. BUT I CAN FEEL... and I have to pull em out.... WHAT ARE THESE?... can i get rid of them?
 
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